Adding/Subtracting Fractions

This link is to an interactive game similar to the Fraction Track game, which we played in class. The object of the game is to get all of the markers to the right side of the game board (from 0 to 1) using as few cards/moves as possible. There also is a link on the page that will take students to a two person version of the game. FYI: Both games run on Java.

http://illuminations.nctm.org/Activity.aspx?id=4148